The details are great. The only thing that kinda irks me is that the simulated dirt on the sides of the rhino cover all of the sides EXCEPT the doors and crest on the back. While I understand you didn't want to cover the freehand painting you did, it makes the vehicle look odd. Like the ultramarines washed the doors and crest, but left the mud on the rest of the vehicle.
Again another nice vehicle with great freehand. The mud looks a little better than the DA Rhino. I might suggest that if you want a little volume with your mud to add some talc or even plaster into your paint mix to make it more mud like and stipple it on with a old brush with the bristles cliped short.